p {
  width: 200px;
  height: 200px;
  background: blue;
  color: red;
}

.app {
  width: 500px;
  height: 500px;
  background: red;
  border-radius: 50%;
}

.cont {
  width: 500px;
  height: 500px;
  background: yellow;
  width: 100px;
}

li {
  width: 200px;
  height: 200px;
  background: green;
}
